MFX Specifications

Scientific Applications

Femtosecond Crystallography

Time-resolved scattering with hard X-rays

Techniques and Scattering Geometry

Macromolecular Crystallography

Forward scattering on fixed-mounted samples, 
and in liquid jets

Small Angle X-ray Scattering

Wide Angle X-ray Scattering

X-ray Emission Spectroscopy

Photon Energy

5-11 keV for the 1^st harmonic*

Up to 25  keV for 2^nd and 3^rd harmonic

Source Size

60 x 60 µm² (HxV) FWHM @ 8.3 keV

78 x 78 µm² (HxV) FWHM @ 2 keV

Source Divergence

2 x 2 µrad² (HxV) FWHM @ 8.3 keV

~7 x 7 µrad² (HxV) FWHM @ 2 keV

Repetition Rate

120 , 60, 30, 10 Hz, Single shot mode

Pulse Duration

30-100 fs (high charge mode)

<10 fs (low charge mode)

Pulse Energy

1-4 mJ  (high charge mode)

~ 0.2 mJ  (low charge mode)

Photons per Pulse

~1 x 10¹² (high charge mode @ 8.3 keV)

~1 x 10¹¹ (low charge mode @ 8.3 keV)

Beryllium Lenses in Hutch 4.5 (~1 µm focus)

0.7 x 0.7 µm² FWHM

~0.3 x 0.3 mrad² FWHM

5-11 keV (1^st harmonic using LCLS-I)

5-20 keV (1^st harmonic using LCLS-II)

11-25  keV (2^nd and 3^rd harmonic using LCLS-I)

20-25  keV (2^nd and 3^rd harmonic using LCLS-II)

~0.2% (bandwidth of the LCLS beam)
No monochromator currently

Atmospheric pressure

Fixed sample on grids at room temperature

Fixed sample on grids at cryogenic temperature

Helium atmosphere

Humidity control

Liquid injectors of various kinds (Rayleigh jet, Gas-Dynamic Virtual Nozzles, High-viscosity extruders, electrospinning jet, piezoelectric droplet-on-demand injectors)

Fixed target holders

Jungfrau 16M (120 Hz operation with 4000 x 4000 pixel)

ePix10K-2.1M (120 Hz operation, currently unavailable)